Rohsenow 2004.

Methods	RCT.
Participants	165 US cocaine dependent patients.
Interventions	1. MET followed by group coping skills (n= 44) 2. MET followed by drug education (n= 39) 3. meditation relaxation followed by group coping skills (n= 44) 4. mediation relaxation followed by drug education (n= 38).
Outcomes	Physiological primary: None. Non‐physiological primary: Number of cocaine use days, percentage of days alcohol used. Secondary: Readiness to change (Cocaine Change Assessment Questionnaire). Data not reported. Retention in treatment (days treated in partial hospital [data not reported]).
Notes	Results data are not available. Mail from Dr. Rohsenow May 19th 2010.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	"Stratified randomisation balanced gender and cocaine use frequency."
Allocation concealment (selection bias)	Unclear risk	Insufficient information to permit judgment.
Blinding (performance bias and detection bias) Patients and providers	Unclear risk	No blinding but the outcome measurements are not likely to be influenced by lack of blinding due to validation with physiological measurement.
Blinding (performance bias and detection bias) Assessors	Low risk	"Research assistants blind to treatment condition conducted assessments."
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	10% attrition at 12 months follow‐up. We do not know the attrition at 3 and 6 months. Reasons for attrition unclear. Unclear if attrition was balanced across groups. Use of ITT was reported, but analyses were not reported with the full sample.
Selective reporting (reporting bias)	Low risk	The published report included all expected outcomes based on the study hypotheses.
Other bias	Unclear risk	Urine drug screens and collateral reports to check on self‐report. The MET group reported drinking on more days at baseline.